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/**
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* Link to the project's GitHub page:
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* https://github.com/pickhardt/coffeescript-codemirror-mode
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*/
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CodeMirror.defineMode('coffeescript', function(conf) {
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var ERRORCLASS = 'error';
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function wordRegexp(words) {
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return new RegExp("^((" + words.join(")|(") + "))\\b");
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}
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var singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!\?]");
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var singleDelimiters = new RegExp('^[\\(\\)\\[\\]\\{\\},:`=;\\.]');
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var doubleOperators = new RegExp("^((\->)|(\=>)|(\\+\\+)|(\\+\\=)|(\\-\\-)|(\\-\\=)|(\\*\\*)|(\\*\\=)|(\\/\\/)|(\\/\\=)|(==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//))");
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var doubleDelimiters = new RegExp("^((\\.\\.)|(\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");
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var tripleDelimiters = new RegExp("^((\\.\\.\\.)|(//=)|(>>=)|(<<=)|(\\*\\*=))");
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var identifiers = new RegExp("^[_A-Za-z$][_A-Za-z$0-9]*");
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var properties = new RegExp("^(@|this\.)[_A-Za-z$][_A-Za-z$0-9]*");
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var wordOperators = wordRegexp(['and', 'or', 'not',
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'is', 'isnt', 'in',
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'instanceof', 'typeof']);
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var indentKeywords = ['for', 'while', 'loop', 'if', 'unless', 'else',
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'switch', 'try', 'catch', 'finally', 'class'];
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var commonKeywords = ['break', 'by', 'continue', 'debugger', 'delete',
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'do', 'in', 'of', 'new', 'return', 'then',
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'this', 'throw', 'when', 'until'];
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var keywords = wordRegexp(indentKeywords.concat(commonKeywords));
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indentKeywords = wordRegexp(indentKeywords);
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var stringPrefixes = new RegExp("^('{3}|\"{3}|['\"])");
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var regexPrefixes = new RegExp("^(/{3}|/)");
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var commonConstants = ['Infinity', 'NaN', 'undefined', 'null', 'true', 'false', 'on', 'off', 'yes', 'no'];
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var constants = wordRegexp(commonConstants);
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// Tokenizers
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function tokenBase(stream, state) {
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// Handle scope changes
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if (stream.sol()) {
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var scopeOffset = state.scopes[0].offset;
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if (stream.eatSpace()) {
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var lineOffset = stream.indentation();
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if (lineOffset > scopeOffset) {
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return 'indent';
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} else if (lineOffset < scopeOffset) {
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return 'dedent';
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}
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return null;
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} else {
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if (scopeOffset > 0) {
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dedent(stream, state);
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}
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}
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}
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if (stream.eatSpace()) {
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return null;
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}
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var ch = stream.peek();
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// Handle docco title comment (single line)
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if (stream.match("####")) {
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stream.skipToEnd();
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return 'comment';
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}
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// Handle multi line comments
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if (stream.match("###")) {
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state.tokenize = longComment;
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return state.tokenize(stream, state);
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}
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// Single line comment
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if (ch === '#') {
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stream.skipToEnd();
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return 'comment';
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}
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// Handle number literals
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if (stream.match(/^-?[0-9\.]/, false)) {
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var floatLiteral = false;
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// Floats
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if (stream.match(/^-?\d*\.\d+(e[\+\-]?\d+)?/i)) {
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floatLiteral = true;
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}
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if (stream.match(/^-?\d+\.\d*/)) {
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floatLiteral = true;
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}
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if (stream.match(/^-?\.\d+/)) {
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floatLiteral = true;
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}
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if (floatLiteral) {
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// prevent from getting extra . on 1..
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if (stream.peek() == "."){
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stream.backUp(1);
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}
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return 'number';
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}
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// Integers
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var intLiteral = false;
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// Hex
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if (stream.match(/^-?0x[0-9a-f]+/i)) {
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intLiteral = true;
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}
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// Decimal
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if (stream.match(/^-?[1-9]\d*(e[\+\-]?\d+)?/)) {
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intLiteral = true;
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}
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// Zero by itself with no other piece of number.
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if (stream.match(/^-?0(?![\dx])/i)) {
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intLiteral = true;
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}
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if (intLiteral) {
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return 'number';
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}
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}
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// Handle strings
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if (stream.match(stringPrefixes)) {
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state.tokenize = tokenFactory(stream.current(), 'string');
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return state.tokenize(stream, state);
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}
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// Handle regex literals
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if (stream.match(regexPrefixes)) {
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if (stream.current() != '/' || stream.match(/^.*\//, false)) { // prevent highlight of division
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state.tokenize = tokenFactory(stream.current(), 'string-2');
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return state.tokenize(stream, state);
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} else {
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stream.backUp(1);
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}
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}
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// Handle operators and delimiters
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if (stream.match(tripleDelimiters) || stream.match(doubleDelimiters)) {
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return 'punctuation';
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}
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if (stream.match(doubleOperators)
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|| stream.match(singleOperators)
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|| stream.match(wordOperators)) {
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return 'operator';
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}
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if (stream.match(singleDelimiters)) {
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return 'punctuation';
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}
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if (stream.match(constants)) {
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return 'atom';
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}
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if (stream.match(keywords)) {
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return 'keyword';
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}
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if (stream.match(identifiers)) {
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return 'variable';
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}
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if (stream.match(properties)) {
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return 'property';
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}
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// Handle non-detected items
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stream.next();
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return ERRORCLASS;
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}
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function tokenFactory(delimiter, outclass) {
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var singleline = delimiter.length == 1;
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return function(stream, state) {
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while (!stream.eol()) {
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stream.eatWhile(/[^'"\/\\]/);
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if (stream.eat('\\')) {
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stream.next();
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if (singleline && stream.eol()) {
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return outclass;
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}
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} else if (stream.match(delimiter)) {
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state.tokenize = tokenBase;
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return outclass;
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} else {
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stream.eat(/['"\/]/);
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}
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}
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if (singleline) {
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if (conf.mode.singleLineStringErrors) {
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outclass = ERRORCLASS;
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} else {
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state.tokenize = tokenBase;
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}
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}
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return outclass;
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};
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}
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function longComment(stream, state) {
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while (!stream.eol()) {
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stream.eatWhile(/[^#]/);
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if (stream.match("###")) {
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state.tokenize = tokenBase;
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break;
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}
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stream.eatWhile("#");
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}
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return "comment";
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}
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function indent(stream, state, type) {
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type = type || 'coffee';
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var indentUnit = 0;
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if (type === 'coffee') {
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for (var i = 0; i < state.scopes.length; i++) {
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if (state.scopes[i].type === 'coffee') {
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indentUnit = state.scopes[i].offset + conf.indentUnit;
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break;
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}
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}
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} else {
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indentUnit = stream.column() + stream.current().length;
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}
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state.scopes.unshift({
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offset: indentUnit,
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type: type
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});
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}
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function dedent(stream, state) {
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if (state.scopes.length == 1) return;
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if (state.scopes[0].type === 'coffee') {
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var _indent = stream.indentation();
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var _indent_index = -1;
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for (var i = 0; i < state.scopes.length; ++i) {
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if (_indent === state.scopes[i].offset) {
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_indent_index = i;
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break;
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}
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}
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if (_indent_index === -1) {
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return true;
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}
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while (state.scopes[0].offset !== _indent) {
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state.scopes.shift();
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}
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return false;
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} else {
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state.scopes.shift();
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return false;
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}
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}
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function tokenLexer(stream, state) {
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var style = state.tokenize(stream, state);
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var current = stream.current();
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// Handle '.' connected identifiers
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if (current === '.') {
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style = state.tokenize(stream, state);
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current = stream.current();
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if (style === 'variable') {
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return 'variable';
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} else {
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return ERRORCLASS;
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}
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}
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// Handle scope changes.
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if (current === 'return') {
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state.dedent += 1;
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}
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if (((current === '->' || current === '=>') &&
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!state.lambda &&
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state.scopes[0].type == 'coffee' &&
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stream.peek() === '')
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|| style === 'indent') {
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indent(stream, state);
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}
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var delimiter_index = '[({'.indexOf(current);
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if (delimiter_index !== -1) {
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indent(stream, state, '])}'.slice(delimiter_index, delimiter_index+1));
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}
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if (indentKeywords.exec(current)){
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indent(stream, state);
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}
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if (current == 'then'){
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dedent(stream, state);
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}
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if (style === 'dedent') {
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if (dedent(stream, state)) {
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return ERRORCLASS;
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}
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}
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delimiter_index = '])}'.indexOf(current);
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if (delimiter_index !== -1) {
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if (dedent(stream, state)) {
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return ERRORCLASS;
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}
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}
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if (state.dedent > 0 && stream.eol() && state.scopes[0].type == 'coffee') {
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if (state.scopes.length > 1) state.scopes.shift();
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state.dedent -= 1;
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}
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return style;
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}
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var external = {
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startState: function(basecolumn) {
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return {
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tokenize: tokenBase,
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scopes: [{offset:basecolumn || 0, type:'coffee'}],
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lastToken: null,
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lambda: false,
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dedent: 0
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};
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},
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token: function(stream, state) {
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var style = tokenLexer(stream, state);
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state.lastToken = {style:style, content: stream.current()};
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if (stream.eol() && stream.lambda) {
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state.lambda = false;
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}
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return style;
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},
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indent: function(state) {
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if (state.tokenize != tokenBase) {
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return 0;
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}
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return state.scopes[0].offset;
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},
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lineComment: "#",
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fold: "indent"
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};
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return external;
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});
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CodeMirror.defineMIME('text/x-coffeescript', 'coffeescript');
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